1 C Programming for Embedded Systems. Data RAM Pointer Types ...

P. Klimo Sep 2010
Pre-Processor:
#define HERE_WE_GO
# ifdef HERE_WE_GO
/* Do something */
#else
static bank1 unsigned char fred; // fred allocated to bank 1
/* do something else */
#endif
static bank3 unsigned char fred; // fred allocated to bank 3
Example of a Simple Source File:
const int a = 66;
int c = 23;
int myFunc( const int x, int y){
static int count =0;
int c;
c = x + y + count++;
// Define integer 66 in program ROM
// Initialize 2 bytes in the general RAM
// Define a function in the general RAM
// Private variable placed in the general RAM
// Automatic variable defined on the myFunc stack
// Will increment count between calls
return c;
}
void main(){
int b;
// The main function executes after initialization
// Automatic variable defined on main’s stack
while(1){
b = myFunc(a, c);
// Infinite Loop calls repeatedly calls myFunc
}
}
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